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Marquise|Lab Grown|IGI

3.09ct D FL Marquise Lab Grown Diamond

EX • D/FL • IGI LG780663326

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG780663326

Diamond specifications and retailer prices

From £2,682 GBP
$3,593 USD
As of October 31, 2026
Save £10,762 GBP (80%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £13,444 GBP at Taylor and Hart · As of October 30, 2026
View at Taylor and Hart

About this 3.09ct lab-grown marquise diamond

This 3.09ct lab-grown marquise sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG780663326 or 780663326. Listed at 12 retailers as of October 30, 2026, with prices from £2,682 to £13,444, a £10,762 spread on the same certified stone. Taylor and Hart lists it at £13,444. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.09
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.9°
Pavilion angle40.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780663326
Dimensions15.09 × 7.69 × 4.66 mm
L/W Ratio1.96
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
15.09 mm7.69 mm3.09 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780663326
Side View
Table 62.0%Crown 32.9°Girdle: Slightly ThickPavilion 40.1°Culet: NoneDepth 60.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £6,836 GBP|Low: £2,682 GBP|High: £17,622 GBP|Avg: £7,555 GBP|-30.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Taylor and Hart
October 30, 2026
Retailer 10£2,682 GBP
Retailer 5£3,016 GBP
Retailer 11£3,220 GBP
Retailer 2£4,777 GBP
Retailer 7£4,872 GBP
Retailer 13£5,803 GBP
Retailer 8£6,189 GBP
Retailer 3£6,447 GBP
Retailer 1£6,836 GBP
Retailer 9£7,849 GBP
Retailer 6£8,755 GBP
Retailer 12£10,147 GBP
Taylor and Hart£13,444 GBP
Retailer 4£17,622 GBP

39 data points across 14 retailers

12 retailers£2,682 GBP to £13,444 GBP

A
Cheapest Retailer
-
£2,682 GBP
$3,593 USD
A
Retailer 2
-
£3,220 GBP
$4,314 USD
View
B+
Retailer 3
-
£4,777 GBP
HK$50,000 HKD
View
B+
Retailer 4
-
£4,872 GBP
View
B+
Retailer 5
-
£5,803 GBP
$7,775 USD
View
B+
Retailer 6
-
£6,189 GBP
€7,898 EUR
View
B+
Retailer 7
-
£6,447 GBP
$8,638 USD
View
B+
Retailer 8
-
£6,836 GBP
$9,160 USD
View
B+
Retailer 9
-
£7,849 GBP
View
B+
Retailer 10
-
£8,755 GBP
ZAR 189,502 ZAR
View
B
Retailer 11
-
£10,147 GBP
$13,596 USD
View
Most Expensive
B
Taylor and Hart
PDT5PTM · Oct 30
£13,444 GBP
$18,013 USD
View
11 more retailers have this diamond
Prices start from £2,682 GBPSave up to £10,762 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
3.09ct Marquise
£2,682 GBP